21204990

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{557}}^1$

素因数の和:623

約数の個数: 80

約数和(自身を含む): 58335552

約数和(自身を除く): 37130562

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 47, 54, 81, 90, 94, 135, 141, 162, 235, 270, 282, 405, 423, 470, 557, 705, 810, 846, 1114, 1269, 1410, 1671, 2115, 2538, 2785, 3342, 3807, 4230, 5013, 5570, 6345, 7614, 8355, 10026, 12690, 15039, 16710, 19035, 25065, 26179, 30078, 38070, 45117, 50130, 52358, 75195, 78537, 90234, 130895, 150390, 157074, 225585, 235611, 261790, 392685, 451170, 471222, 706833, 785370, 1178055, 1413666, 2120499, 2356110, 3534165, 4240998, 7068330, 10602495, 21204990]

約数ペア:

[(1, 21204990), (2, 10602495), (3, 7068330), (5, 4240998), (6, 3534165), (9, 2356110), (10, 2120499), (15, 1413666), (18, 1178055), (27, 785370), (30, 706833), (45, 471222), (47, 451170), (54, 392685), (81, 261790), (90, 235611), (94, 225585), (135, 157074), (141, 150390), (162, 130895), (235, 90234), (270, 78537), (282, 75195), (405, 52358), (423, 50130), (470, 45117), (557, 38070), (705, 30078), (810, 26179), (846, 25065), (1114, 19035), (1269, 16710), (1410, 15039), (1671, 12690), (2115, 10026), (2538, 8355), (2785, 7614), (3342, 6345), (3807, 5570), (4230, 5013)]