20911980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{11243}}^1$

素因数の和:11286

約数の個数: 48

約数和(自身を含む): 60447744

約数和(自身を除く): 39535764

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 31, 60, 62, 93, 124, 155, 186, 310, 372, 465, 620, 930, 1860, 11243, 22486, 33729, 44972, 56215, 67458, 112430, 134916, 168645, 224860, 337290, 348533, 674580, 697066, 1045599, 1394132, 1742665, 2091198, 3485330, 4182396, 5227995, 6970660, 10455990, 20911980]

約数ペア:

[(1, 20911980), (2, 10455990), (3, 6970660), (4, 5227995), (5, 4182396), (6, 3485330), (10, 2091198), (12, 1742665), (15, 1394132), (20, 1045599), (30, 697066), (31, 674580), (60, 348533), (62, 337290), (93, 224860), (124, 168645), (155, 134916), (186, 112430), (310, 67458), (372, 56215), (465, 44972), (620, 33729), (930, 22486), (1860, 11243)]