21553740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1$

素因数の和:240

約数の個数: 144

約数和(自身を含む): 72037056

約数和(自身を除く): 50483316

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 61, 65, 78, 90, 117, 122, 130, 151, 156, 180, 183, 195, 234, 244, 260, 302, 305, 366, 390, 453, 468, 549, 585, 604, 610, 732, 755, 780, 793, 906, 915, 1098, 1170, 1220, 1359, 1510, 1586, 1812, 1830, 1963, 2196, 2265, 2340, 2379, 2718, 2745, 3020, 3172, 3660, 3926, 3965, 4530, 4758, 5436, 5490, 5889, 6795, 7137, 7852, 7930, 9060, 9211, 9516, 9815, 10980, 11778, 11895, 13590, 14274, 15860, 17667, 18422, 19630, 23556, 23790, 27180, 27633, 28548, 29445, 35334, 35685, 36844, 39260, 46055, 47580, 55266, 58890, 70668, 71370, 82899, 88335, 92110, 110532, 117780, 119743, 138165, 142740, 165798, 176670, 184220, 239486, 276330, 331596, 353340, 359229, 414495, 478972, 552660, 598715, 718458, 828990, 1077687, 1197430, 1436916, 1657980, 1796145, 2155374, 2394860, 3592290, 4310748, 5388435, 7184580, 10776870, 21553740]

約数ペア:

[(1, 21553740), (2, 10776870), (3, 7184580), (4, 5388435), (5, 4310748), (6, 3592290), (9, 2394860), (10, 2155374), (12, 1796145), (13, 1657980), (15, 1436916), (18, 1197430), (20, 1077687), (26, 828990), (30, 718458), (36, 598715), (39, 552660), (45, 478972), (52, 414495), (60, 359229), (61, 353340), (65, 331596), (78, 276330), (90, 239486), (117, 184220), (122, 176670), (130, 165798), (151, 142740), (156, 138165), (180, 119743), (183, 117780), (195, 110532), (234, 92110), (244, 88335), (260, 82899), (302, 71370), (305, 70668), (366, 58890), (390, 55266), (453, 47580), (468, 46055), (549, 39260), (585, 36844), (604, 35685), (610, 35334), (732, 29445), (755, 28548), (780, 27633), (793, 27180), (906, 23790), (915, 23556), (1098, 19630), (1170, 18422), (1220, 17667), (1359, 15860), (1510, 14274), (1586, 13590), (1812, 11895), (1830, 11778), (1963, 10980), (2196, 9815), (2265, 9516), (2340, 9211), (2379, 9060), (2718, 7930), (2745, 7852), (3020, 7137), (3172, 6795), (3660, 5889), (3926, 5490), (3965, 5436), (4530, 4758)]