20457990

素因数分解:

$2^1\times 3^2\times 5^1\times 7^2\times {\mathrm{4639}}^1$

素因数の和:4666

約数の個数: 72

約数和(自身を含む): 61888320

約数和(自身を除く): 41430330

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 49, 63, 70, 90, 98, 105, 126, 147, 210, 245, 294, 315, 441, 490, 630, 735, 882, 1470, 2205, 4410, 4639, 9278, 13917, 23195, 27834, 32473, 41751, 46390, 64946, 69585, 83502, 97419, 139170, 162365, 194838, 208755, 227311, 292257, 324730, 417510, 454622, 487095, 584514, 681933, 974190, 1136555, 1363866, 1461285, 2045799, 2273110, 2922570, 3409665, 4091598, 6819330, 10228995, 20457990]

約数ペア:

[(1, 20457990), (2, 10228995), (3, 6819330), (5, 4091598), (6, 3409665), (7, 2922570), (9, 2273110), (10, 2045799), (14, 1461285), (15, 1363866), (18, 1136555), (21, 974190), (30, 681933), (35, 584514), (42, 487095), (45, 454622), (49, 417510), (63, 324730), (70, 292257), (90, 227311), (98, 208755), (105, 194838), (126, 162365), (147, 139170), (210, 97419), (245, 83502), (294, 69585), (315, 64946), (441, 46390), (490, 41751), (630, 32473), (735, 27834), (882, 23195), (1470, 13917), (2205, 9278), (4410, 4639)]