20928440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{241}}^1$

素因数の和:432

約数の個数: 64

約数和(自身を含む): 51226560

約数和(自身を除く): 30298120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 167, 241, 260, 334, 482, 520, 668, 835, 964, 1205, 1336, 1670, 1928, 2171, 2410, 3133, 3340, 4342, 4820, 6266, 6680, 8684, 9640, 10855, 12532, 15665, 17368, 21710, 25064, 31330, 40247, 43420, 62660, 80494, 86840, 125320, 160988, 201235, 321976, 402470, 523211, 804940, 1046422, 1609880, 2092844, 2616055, 4185688, 5232110, 10464220, 20928440]

約数ペア:

[(1, 20928440), (2, 10464220), (4, 5232110), (5, 4185688), (8, 2616055), (10, 2092844), (13, 1609880), (20, 1046422), (26, 804940), (40, 523211), (52, 402470), (65, 321976), (104, 201235), (130, 160988), (167, 125320), (241, 86840), (260, 80494), (334, 62660), (482, 43420), (520, 40247), (668, 31330), (835, 25064), (964, 21710), (1205, 17368), (1336, 15665), (1670, 12532), (1928, 10855), (2171, 9640), (2410, 8684), (3133, 6680), (3340, 6266), (4342, 4820)]