18931640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{743}}^1$

素因数の和:781

約数の個数: 96

約数和(自身を含む): 53434080

約数和(自身を除く): 34502440

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 91, 98, 104, 130, 140, 182, 196, 245, 260, 280, 364, 392, 455, 490, 520, 637, 728, 743, 910, 980, 1274, 1486, 1820, 1960, 2548, 2972, 3185, 3640, 3715, 5096, 5201, 5944, 6370, 7430, 9659, 10402, 12740, 14860, 19318, 20804, 25480, 26005, 29720, 36407, 38636, 41608, 48295, 52010, 67613, 72814, 77272, 96590, 104020, 135226, 145628, 182035, 193180, 208040, 270452, 291256, 338065, 364070, 386360, 473291, 540904, 676130, 728140, 946582, 1352260, 1456280, 1893164, 2366455, 2704520, 3786328, 4732910, 9465820, 18931640]

約数ペア:

[(1, 18931640), (2, 9465820), (4, 4732910), (5, 3786328), (7, 2704520), (8, 2366455), (10, 1893164), (13, 1456280), (14, 1352260), (20, 946582), (26, 728140), (28, 676130), (35, 540904), (40, 473291), (49, 386360), (52, 364070), (56, 338065), (65, 291256), (70, 270452), (91, 208040), (98, 193180), (104, 182035), (130, 145628), (140, 135226), (182, 104020), (196, 96590), (245, 77272), (260, 72814), (280, 67613), (364, 52010), (392, 48295), (455, 41608), (490, 38636), (520, 36407), (637, 29720), (728, 26005), (743, 25480), (910, 20804), (980, 19318), (1274, 14860), (1486, 12740), (1820, 10402), (1960, 9659), (2548, 7430), (2972, 6370), (3185, 5944), (3640, 5201), (3715, 5096)]