21551207428

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{151}}^1\times {\mathrm{331}}^1\times {\mathrm{373}}^1$

素因数の和:893

約数の個数: 72

約数和(自身を含む): 40559228864

約数和(自身を除く): 19008021436

約数列:

[1, 2, 4, 17, 34, 68, 151, 289, 302, 331, 373, 578, 604, 662, 746, 1156, 1324, 1492, 2567, 5134, 5627, 6341, 10268, 11254, 12682, 22508, 25364, 43639, 49981, 56323, 87278, 95659, 99962, 107797, 112646, 123463, 174556, 191318, 199924, 215594, 225292, 246926, 382636, 431188, 493852, 849677, 957491, 1699354, 1914982, 2098871, 3398708, 3829964, 4197742, 8395484, 14444509, 16277347, 18642913, 28889018, 32554694, 35680807, 37285826, 57778036, 65109388, 71361614, 74571652, 142723228, 316929521, 633859042, 1267718084, 5387801857, 10775603714, 21551207428]

約数ペア:

[(1, 21551207428), (2, 10775603714), (4, 5387801857), (17, 1267718084), (34, 633859042), (68, 316929521), (151, 142723228), (289, 74571652), (302, 71361614), (331, 65109388), (373, 57778036), (578, 37285826), (604, 35680807), (662, 32554694), (746, 28889018), (1156, 18642913), (1324, 16277347), (1492, 14444509), (2567, 8395484), (5134, 4197742), (5627, 3829964), (6341, 3398708), (10268, 2098871), (11254, 1914982), (12682, 1699354), (22508, 957491), (25364, 849677), (43639, 493852), (49981, 431188), (56323, 382636), (87278, 246926), (95659, 225292), (99962, 215594), (107797, 199924), (112646, 191318), (123463, 174556)]