19804460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{211}}^1$

素因数の和:271

約数の個数: 72

約数和(自身を含む): 47493936

約数和(自身を除く): 27689476

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 211, 247, 260, 361, 380, 422, 494, 722, 844, 988, 1055, 1235, 1444, 1805, 2110, 2470, 2743, 3610, 4009, 4220, 4693, 4940, 5486, 7220, 8018, 9386, 10972, 13715, 16036, 18772, 20045, 23465, 27430, 40090, 46930, 52117, 54860, 76171, 80180, 93860, 104234, 152342, 208468, 260585, 304684, 380855, 521170, 761710, 990223, 1042340, 1523420, 1980446, 3960892, 4951115, 9902230, 19804460]

約数ペア:

[(1, 19804460), (2, 9902230), (4, 4951115), (5, 3960892), (10, 1980446), (13, 1523420), (19, 1042340), (20, 990223), (26, 761710), (38, 521170), (52, 380855), (65, 304684), (76, 260585), (95, 208468), (130, 152342), (190, 104234), (211, 93860), (247, 80180), (260, 76171), (361, 54860), (380, 52117), (422, 46930), (494, 40090), (722, 27430), (844, 23465), (988, 20045), (1055, 18772), (1235, 16036), (1444, 13715), (1805, 10972), (2110, 9386), (2470, 8018), (2743, 7220), (3610, 5486), (4009, 4940), (4220, 4693)]