640378160

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{1733}}^1$

素因数の和:1926

約数の個数: 80

約数和(自身を含む): 1548115200

約数和(自身を除く): 907737040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 149, 155, 248, 298, 310, 496, 596, 620, 745, 1192, 1240, 1490, 1733, 2384, 2480, 2980, 3466, 4619, 5960, 6932, 8665, 9238, 11920, 13864, 17330, 18476, 23095, 27728, 34660, 36952, 46190, 53723, 69320, 73904, 92380, 107446, 138640, 184760, 214892, 258217, 268615, 369520, 429784, 516434, 537230, 859568, 1032868, 1074460, 1291085, 2065736, 2148920, 2582170, 4131472, 4297840, 5164340, 8004727, 10328680, 16009454, 20657360, 32018908, 40023635, 64037816, 80047270, 128075632, 160094540, 320189080, 640378160]

約数ペア:

[(1, 640378160), (2, 320189080), (4, 160094540), (5, 128075632), (8, 80047270), (10, 64037816), (16, 40023635), (20, 32018908), (31, 20657360), (40, 16009454), (62, 10328680), (80, 8004727), (124, 5164340), (149, 4297840), (155, 4131472), (248, 2582170), (298, 2148920), (310, 2065736), (496, 1291085), (596, 1074460), (620, 1032868), (745, 859568), (1192, 537230), (1240, 516434), (1490, 429784), (1733, 369520), (2384, 268615), (2480, 258217), (2980, 214892), (3466, 184760), (4619, 138640), (5960, 107446), (6932, 92380), (8665, 73904), (9238, 69320), (11920, 53723), (13864, 46190), (17330, 36952), (18476, 34660), (23095, 27728)]