20015320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{631}}^1$

素因数の和:716

約数の個数: 64

約数和(自身を含む): 49371840

約数和(自身を除く): 29356520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 244, 260, 305, 488, 520, 610, 631, 793, 1220, 1262, 1586, 2440, 2524, 3155, 3172, 3965, 5048, 6310, 6344, 7930, 8203, 12620, 15860, 16406, 25240, 31720, 32812, 38491, 41015, 65624, 76982, 82030, 153964, 164060, 192455, 307928, 328120, 384910, 500383, 769820, 1000766, 1539640, 2001532, 2501915, 4003064, 5003830, 10007660, 20015320]

約数ペア:

[(1, 20015320), (2, 10007660), (4, 5003830), (5, 4003064), (8, 2501915), (10, 2001532), (13, 1539640), (20, 1000766), (26, 769820), (40, 500383), (52, 384910), (61, 328120), (65, 307928), (104, 192455), (122, 164060), (130, 153964), (244, 82030), (260, 76982), (305, 65624), (488, 41015), (520, 38491), (610, 32812), (631, 31720), (793, 25240), (1220, 16406), (1262, 15860), (1586, 12620), (2440, 8203), (2524, 7930), (3155, 6344), (3172, 6310), (3965, 5048)]