21004100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{151}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 49871808

約数和(自身を除く): 28867708

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 107, 130, 151, 214, 260, 302, 325, 428, 535, 604, 650, 755, 1070, 1300, 1391, 1510, 1963, 2140, 2675, 2782, 3020, 3775, 3926, 5350, 5564, 6955, 7550, 7852, 9815, 10700, 13910, 15100, 16157, 19630, 27820, 32314, 34775, 39260, 49075, 64628, 69550, 80785, 98150, 139100, 161570, 196300, 210041, 323140, 403925, 420082, 807850, 840164, 1050205, 1615700, 2100410, 4200820, 5251025, 10502050, 21004100]

約数ペア:

[(1, 21004100), (2, 10502050), (4, 5251025), (5, 4200820), (10, 2100410), (13, 1615700), (20, 1050205), (25, 840164), (26, 807850), (50, 420082), (52, 403925), (65, 323140), (100, 210041), (107, 196300), (130, 161570), (151, 139100), (214, 98150), (260, 80785), (302, 69550), (325, 64628), (428, 49075), (535, 39260), (604, 34775), (650, 32314), (755, 27820), (1070, 19630), (1300, 16157), (1391, 15100), (1510, 13910), (1963, 10700), (2140, 9815), (2675, 7852), (2782, 7550), (3020, 6955), (3775, 5564), (3926, 5350)]