21909720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{26083}}^1$

素因数の和:26104

約数の個数: 64

約数和(自身を含む): 75121920

約数和(自身を除く): 53212200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 26083, 52166, 78249, 104332, 130415, 156498, 182581, 208664, 260830, 312996, 365162, 391245, 521660, 547743, 625992, 730324, 782490, 912905, 1043320, 1095486, 1460648, 1564980, 1825810, 2190972, 2738715, 3129960, 3651620, 4381944, 5477430, 7303240, 10954860, 21909720]

約数ペア:

[(1, 21909720), (2, 10954860), (3, 7303240), (4, 5477430), (5, 4381944), (6, 3651620), (7, 3129960), (8, 2738715), (10, 2190972), (12, 1825810), (14, 1564980), (15, 1460648), (20, 1095486), (21, 1043320), (24, 912905), (28, 782490), (30, 730324), (35, 625992), (40, 547743), (42, 521660), (56, 391245), (60, 365162), (70, 312996), (84, 260830), (105, 208664), (120, 182581), (140, 156498), (168, 130415), (210, 104332), (280, 78249), (420, 52166), (840, 26083)]