20919340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1319}}^1$

素因数の和:1402

約数の個数: 48

約数和(自身を含む): 48121920

約数和(自身を除く): 27202580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 244, 260, 305, 610, 793, 1220, 1319, 1586, 2638, 3172, 3965, 5276, 6595, 7930, 13190, 15860, 17147, 26380, 34294, 68588, 80459, 85735, 160918, 171470, 321836, 342940, 402295, 804590, 1045967, 1609180, 2091934, 4183868, 5229835, 10459670, 20919340]

約数ペア:

[(1, 20919340), (2, 10459670), (4, 5229835), (5, 4183868), (10, 2091934), (13, 1609180), (20, 1045967), (26, 804590), (52, 402295), (61, 342940), (65, 321836), (122, 171470), (130, 160918), (244, 85735), (260, 80459), (305, 68588), (610, 34294), (793, 26380), (1220, 17147), (1319, 15860), (1586, 13190), (2638, 7930), (3172, 6595), (3965, 5276)]