19640780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{947}}^1$

素因数の和:1034

約数の個数: 48

約数和(自身を含む): 44434656

約数和(自身を除く): 24793876

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 61, 68, 85, 122, 170, 244, 305, 340, 610, 947, 1037, 1220, 1894, 2074, 3788, 4148, 4735, 5185, 9470, 10370, 16099, 18940, 20740, 32198, 57767, 64396, 80495, 115534, 160990, 231068, 288835, 321980, 577670, 982039, 1155340, 1964078, 3928156, 4910195, 9820390, 19640780]

約数ペア:

[(1, 19640780), (2, 9820390), (4, 4910195), (5, 3928156), (10, 1964078), (17, 1155340), (20, 982039), (34, 577670), (61, 321980), (68, 288835), (85, 231068), (122, 160990), (170, 115534), (244, 80495), (305, 64396), (340, 57767), (610, 32198), (947, 20740), (1037, 18940), (1220, 16099), (1894, 10370), (2074, 9470), (3788, 5185), (4148, 4735)]