20199723740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{661}}^1\times {\mathrm{31183}}^1$

素因数の和:31867

約数の個数: 72

約数和(自身を含む): 49421276352

約数和(自身を除く): 29221552612

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 661, 980, 1322, 2644, 3305, 4627, 6610, 9254, 13220, 18508, 23135, 31183, 32389, 46270, 62366, 64778, 92540, 124732, 129556, 155915, 161945, 218281, 311830, 323890, 436562, 623660, 647780, 873124, 1091405, 1527967, 2182810, 3055934, 4365620, 6111868, 7639835, 15279670, 20611963, 30559340, 41223926, 82447852, 103059815, 144283741, 206119630, 288567482, 412239260, 577134964, 721418705, 1009986187, 1442837410, 2019972374, 2885674820, 4039944748, 5049930935, 10099861870, 20199723740]

約数ペア:

[(1, 20199723740), (2, 10099861870), (4, 5049930935), (5, 4039944748), (7, 2885674820), (10, 2019972374), (14, 1442837410), (20, 1009986187), (28, 721418705), (35, 577134964), (49, 412239260), (70, 288567482), (98, 206119630), (140, 144283741), (196, 103059815), (245, 82447852), (490, 41223926), (661, 30559340), (980, 20611963), (1322, 15279670), (2644, 7639835), (3305, 6111868), (4627, 4365620), (6610, 3055934), (9254, 2182810), (13220, 1527967), (18508, 1091405), (23135, 873124), (31183, 647780), (32389, 623660), (46270, 436562), (62366, 323890), (64778, 311830), (92540, 218281), (124732, 161945), (129556, 155915)]