161675540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{1543}}^1$

素因数の和:1609

約数の個数: 72

約数和(自身を含む): 379749888

約数和(自身を除く): 218074348

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 260, 310, 338, 403, 620, 676, 806, 845, 1543, 1612, 1690, 2015, 3086, 3380, 4030, 5239, 6172, 7715, 8060, 10478, 15430, 20059, 20956, 26195, 30860, 40118, 47833, 52390, 80236, 95666, 100295, 104780, 191332, 200590, 239165, 260767, 401180, 478330, 521534, 621829, 956660, 1043068, 1243658, 1303835, 2487316, 2607670, 3109145, 5215340, 6218290, 8083777, 12436580, 16167554, 32335108, 40418885, 80837770, 161675540]

約数ペア:

[(1, 161675540), (2, 80837770), (4, 40418885), (5, 32335108), (10, 16167554), (13, 12436580), (20, 8083777), (26, 6218290), (31, 5215340), (52, 3109145), (62, 2607670), (65, 2487316), (124, 1303835), (130, 1243658), (155, 1043068), (169, 956660), (260, 621829), (310, 521534), (338, 478330), (403, 401180), (620, 260767), (676, 239165), (806, 200590), (845, 191332), (1543, 104780), (1612, 100295), (1690, 95666), (2015, 80236), (3086, 52390), (3380, 47833), (4030, 40118), (5239, 30860), (6172, 26195), (7715, 20956), (8060, 20059), (10478, 15430)]