28620100

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 65620800

約数和(自身を除く): 37000700

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 71, 100, 116, 139, 142, 145, 278, 284, 290, 355, 556, 580, 695, 710, 725, 1390, 1420, 1450, 1775, 2059, 2780, 2900, 3475, 3550, 4031, 4118, 6950, 7100, 8062, 8236, 9869, 10295, 13900, 16124, 19738, 20155, 20590, 39476, 40310, 41180, 49345, 51475, 80620, 98690, 100775, 102950, 197380, 201550, 205900, 246725, 286201, 403100, 493450, 572402, 986900, 1144804, 1431005, 2862010, 5724020, 7155025, 14310050, 28620100]

約数ペア:

[(1, 28620100), (2, 14310050), (4, 7155025), (5, 5724020), (10, 2862010), (20, 1431005), (25, 1144804), (29, 986900), (50, 572402), (58, 493450), (71, 403100), (100, 286201), (116, 246725), (139, 205900), (142, 201550), (145, 197380), (278, 102950), (284, 100775), (290, 98690), (355, 80620), (556, 51475), (580, 49345), (695, 41180), (710, 40310), (725, 39476), (1390, 20590), (1420, 20155), (1450, 19738), (1775, 16124), (2059, 13900), (2780, 10295), (2900, 9869), (3475, 8236), (3550, 8062), (4031, 7100), (4118, 6950)]