21000947985

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{654541}}^1$

素因数の和:654606

約数の個数: 48

約数和(自身を含む): 39209683968

約数和(自身を除く): 18208735983

約数列:

[1, 3, 5, 9, 15, 23, 31, 45, 69, 93, 115, 155, 207, 279, 345, 465, 713, 1035, 1395, 2139, 3565, 6417, 10695, 32085, 654541, 1963623, 3272705, 5890869, 9818115, 15054443, 20290771, 29454345, 45163329, 60872313, 75272215, 101453855, 135489987, 182616939, 225816645, 304361565, 466687733, 677449935, 913084695, 1400063199, 2333438665, 4200189597, 7000315995, 21000947985]

約数ペア:

[(1, 21000947985), (3, 7000315995), (5, 4200189597), (9, 2333438665), (15, 1400063199), (23, 913084695), (31, 677449935), (45, 466687733), (69, 304361565), (93, 225816645), (115, 182616939), (155, 135489987), (207, 101453855), (279, 75272215), (345, 60872313), (465, 45163329), (713, 29454345), (1035, 20290771), (1395, 15054443), (2139, 9818115), (3565, 5890869), (6417, 3272705), (10695, 1963623), (32085, 654541)]