20865040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:129

約数の個数: 160

約数和(自身を含む): 61067520

約数和(自身を除く): 40202480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 37, 38, 40, 53, 56, 70, 74, 76, 80, 95, 106, 112, 133, 140, 148, 152, 185, 190, 212, 259, 265, 266, 280, 296, 304, 370, 371, 380, 424, 518, 530, 532, 560, 592, 665, 703, 740, 742, 760, 848, 1007, 1036, 1060, 1064, 1295, 1330, 1406, 1480, 1484, 1520, 1855, 1961, 2014, 2072, 2120, 2128, 2590, 2660, 2812, 2960, 2968, 3515, 3710, 3922, 4028, 4144, 4240, 4921, 5035, 5180, 5320, 5624, 5936, 7030, 7049, 7420, 7844, 8056, 9805, 9842, 10070, 10360, 10640, 11248, 13727, 14060, 14098, 14840, 15688, 16112, 19610, 19684, 20140, 20720, 24605, 27454, 28120, 28196, 29680, 31376, 35245, 37259, 39220, 39368, 40280, 49210, 54908, 56240, 56392, 68635, 70490, 74518, 78440, 78736, 80560, 98420, 109816, 112784, 137270, 140980, 149036, 156880, 186295, 196840, 219632, 260813, 274540, 281960, 298072, 372590, 393680, 521626, 549080, 563920, 596144, 745180, 1043252, 1098160, 1304065, 1490360, 2086504, 2608130, 2980720, 4173008, 5216260, 10432520, 20865040]

約数ペア:

[(1, 20865040), (2, 10432520), (4, 5216260), (5, 4173008), (7, 2980720), (8, 2608130), (10, 2086504), (14, 1490360), (16, 1304065), (19, 1098160), (20, 1043252), (28, 745180), (35, 596144), (37, 563920), (38, 549080), (40, 521626), (53, 393680), (56, 372590), (70, 298072), (74, 281960), (76, 274540), (80, 260813), (95, 219632), (106, 196840), (112, 186295), (133, 156880), (140, 149036), (148, 140980), (152, 137270), (185, 112784), (190, 109816), (212, 98420), (259, 80560), (265, 78736), (266, 78440), (280, 74518), (296, 70490), (304, 68635), (370, 56392), (371, 56240), (380, 54908), (424, 49210), (518, 40280), (530, 39368), (532, 39220), (560, 37259), (592, 35245), (665, 31376), (703, 29680), (740, 28196), (742, 28120), (760, 27454), (848, 24605), (1007, 20720), (1036, 20140), (1060, 19684), (1064, 19610), (1295, 16112), (1330, 15688), (1406, 14840), (1480, 14098), (1484, 14060), (1520, 13727), (1855, 11248), (1961, 10640), (2014, 10360), (2072, 10070), (2120, 9842), (2128, 9805), (2590, 8056), (2660, 7844), (2812, 7420), (2960, 7049), (2968, 7030), (3515, 5936), (3710, 5624), (3922, 5320), (4028, 5180), (4144, 5035), (4240, 4921)]