20987910

素因数分解:

$2^1\times 3^6\times 5^1\times {\mathrm{2879}}^1$

素因数の和:2904

約数の個数: 56

約数和(自身を含む): 56661120

約数和(自身を除く): 35673210

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 243, 270, 405, 486, 729, 810, 1215, 1458, 2430, 2879, 3645, 5758, 7290, 8637, 14395, 17274, 25911, 28790, 43185, 51822, 77733, 86370, 129555, 155466, 233199, 259110, 388665, 466398, 699597, 777330, 1165995, 1399194, 2098791, 2331990, 3497985, 4197582, 6995970, 10493955, 20987910]

約数ペア:

[(1, 20987910), (2, 10493955), (3, 6995970), (5, 4197582), (6, 3497985), (9, 2331990), (10, 2098791), (15, 1399194), (18, 1165995), (27, 777330), (30, 699597), (45, 466398), (54, 388665), (81, 259110), (90, 233199), (135, 155466), (162, 129555), (243, 86370), (270, 77733), (405, 51822), (486, 43185), (729, 28790), (810, 25911), (1215, 17274), (1458, 14395), (2430, 8637), (2879, 7290), (3645, 5758)]