20504120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:205

約数の個数: 128

約数和(自身を含む): 58544640

約数和(自身を除く): 38040520

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 43, 52, 56, 65, 70, 86, 91, 104, 130, 131, 140, 172, 182, 215, 260, 262, 280, 301, 344, 364, 430, 455, 520, 524, 559, 602, 655, 728, 860, 910, 917, 1048, 1118, 1204, 1310, 1505, 1703, 1720, 1820, 1834, 2236, 2408, 2620, 2795, 3010, 3406, 3640, 3668, 3913, 4472, 4585, 5240, 5590, 5633, 6020, 6812, 7336, 7826, 8515, 9170, 11180, 11266, 11921, 12040, 13624, 15652, 17030, 18340, 19565, 22360, 22532, 23842, 28165, 31304, 34060, 36680, 39130, 39431, 45064, 47684, 56330, 59605, 68120, 73229, 78260, 78862, 95368, 112660, 119210, 146458, 156520, 157724, 197155, 225320, 238420, 292916, 315448, 366145, 394310, 476840, 512603, 585832, 732290, 788620, 1025206, 1464580, 1577240, 2050412, 2563015, 2929160, 4100824, 5126030, 10252060, 20504120]

約数ペア:

[(1, 20504120), (2, 10252060), (4, 5126030), (5, 4100824), (7, 2929160), (8, 2563015), (10, 2050412), (13, 1577240), (14, 1464580), (20, 1025206), (26, 788620), (28, 732290), (35, 585832), (40, 512603), (43, 476840), (52, 394310), (56, 366145), (65, 315448), (70, 292916), (86, 238420), (91, 225320), (104, 197155), (130, 157724), (131, 156520), (140, 146458), (172, 119210), (182, 112660), (215, 95368), (260, 78862), (262, 78260), (280, 73229), (301, 68120), (344, 59605), (364, 56330), (430, 47684), (455, 45064), (520, 39431), (524, 39130), (559, 36680), (602, 34060), (655, 31304), (728, 28165), (860, 23842), (910, 22532), (917, 22360), (1048, 19565), (1118, 18340), (1204, 17030), (1310, 15652), (1505, 13624), (1703, 12040), (1720, 11921), (1820, 11266), (1834, 11180), (2236, 9170), (2408, 8515), (2620, 7826), (2795, 7336), (3010, 6812), (3406, 6020), (3640, 5633), (3668, 5590), (3913, 5240), (4472, 4585)]