20164456520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1993}}^1\times {\mathrm{19457}}^1$

素因数の和:21474

約数の個数: 64

約数和(自身を含む): 48887057520

約数和(自身を除く): 28722601000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1993, 3986, 7972, 9965, 15944, 19457, 19930, 25909, 38914, 39860, 51818, 77828, 79720, 97285, 103636, 129545, 155656, 194570, 207272, 252941, 259090, 389140, 505882, 518180, 778280, 1011764, 1036360, 1264705, 2023528, 2529410, 5058820, 10117640, 38777801, 77555602, 155111204, 193889005, 310222408, 387778010, 504111413, 775556020, 1008222826, 1551112040, 2016445652, 2520557065, 4032891304, 5041114130, 10082228260, 20164456520]

約数ペア:

[(1, 20164456520), (2, 10082228260), (4, 5041114130), (5, 4032891304), (8, 2520557065), (10, 2016445652), (13, 1551112040), (20, 1008222826), (26, 775556020), (40, 504111413), (52, 387778010), (65, 310222408), (104, 193889005), (130, 155111204), (260, 77555602), (520, 38777801), (1993, 10117640), (3986, 5058820), (7972, 2529410), (9965, 2023528), (15944, 1264705), (19457, 1036360), (19930, 1011764), (25909, 778280), (38914, 518180), (39860, 505882), (51818, 389140), (77828, 259090), (79720, 252941), (97285, 207272), (103636, 194570), (129545, 155656)]