81891890

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 162712800

約数和(自身を除く): 80820910

約数列:

[1, 2, 5, 10, 17, 34, 53, 61, 85, 106, 122, 149, 170, 265, 298, 305, 530, 610, 745, 901, 1037, 1490, 1802, 2074, 2533, 3233, 4505, 5066, 5185, 6466, 7897, 9010, 9089, 10370, 12665, 15794, 16165, 18178, 25330, 32330, 39485, 45445, 54961, 78970, 90890, 109922, 134249, 154513, 268498, 274805, 309026, 481717, 549610, 671245, 772565, 963434, 1342490, 1545130, 2408585, 4817170, 8189189, 16378378, 40945945, 81891890]

約数ペア:

[(1, 81891890), (2, 40945945), (5, 16378378), (10, 8189189), (17, 4817170), (34, 2408585), (53, 1545130), (61, 1342490), (85, 963434), (106, 772565), (122, 671245), (149, 549610), (170, 481717), (265, 309026), (298, 274805), (305, 268498), (530, 154513), (610, 134249), (745, 109922), (901, 90890), (1037, 78970), (1490, 54961), (1802, 45445), (2074, 39485), (2533, 32330), (3233, 25330), (4505, 18178), (5066, 16165), (5185, 15794), (6466, 12665), (7897, 10370), (9010, 9089)]