21720990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{719}}^1$

素因数の和:801

約数の個数: 64

約数和(自身を含む): 55987200

約数和(自身を除く): 34266210

約数列:

[1, 2, 3, 5, 6, 10, 15, 19, 30, 38, 53, 57, 95, 106, 114, 159, 190, 265, 285, 318, 530, 570, 719, 795, 1007, 1438, 1590, 2014, 2157, 3021, 3595, 4314, 5035, 6042, 7190, 10070, 10785, 13661, 15105, 21570, 27322, 30210, 38107, 40983, 68305, 76214, 81966, 114321, 136610, 190535, 204915, 228642, 381070, 409830, 571605, 724033, 1143210, 1448066, 2172099, 3620165, 4344198, 7240330, 10860495, 21720990]

約数ペア:

[(1, 21720990), (2, 10860495), (3, 7240330), (5, 4344198), (6, 3620165), (10, 2172099), (15, 1448066), (19, 1143210), (30, 724033), (38, 571605), (53, 409830), (57, 381070), (95, 228642), (106, 204915), (114, 190535), (159, 136610), (190, 114321), (265, 81966), (285, 76214), (318, 68305), (530, 40983), (570, 38107), (719, 30210), (795, 27322), (1007, 21570), (1438, 15105), (1590, 13661), (2014, 10785), (2157, 10070), (3021, 7190), (3595, 6042), (4314, 5035)]