1215661990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1\times {\mathrm{491}}^1$

素因数の和:757

約数の個数: 64

約数和(自身を含む): 2350736640

約数和(自身を除く): 1135074650

約数列:

[1, 2, 5, 10, 19, 38, 83, 95, 157, 166, 190, 314, 415, 491, 785, 830, 982, 1570, 1577, 2455, 2983, 3154, 4910, 5966, 7885, 9329, 13031, 14915, 15770, 18658, 26062, 29830, 40753, 46645, 65155, 77087, 81506, 93290, 130310, 154174, 203765, 247589, 385435, 407530, 495178, 770870, 774307, 1237945, 1464653, 1548614, 2475890, 2929306, 3871535, 6398221, 7323265, 7743070, 12796442, 14646530, 31991105, 63982210, 121566199, 243132398, 607830995, 1215661990]

約数ペア:

[(1, 1215661990), (2, 607830995), (5, 243132398), (10, 121566199), (19, 63982210), (38, 31991105), (83, 14646530), (95, 12796442), (157, 7743070), (166, 7323265), (190, 6398221), (314, 3871535), (415, 2929306), (491, 2475890), (785, 1548614), (830, 1464653), (982, 1237945), (1570, 774307), (1577, 770870), (2455, 495178), (2983, 407530), (3154, 385435), (4910, 247589), (5966, 203765), (7885, 154174), (9329, 130310), (13031, 93290), (14915, 81506), (15770, 77087), (18658, 65155), (26062, 46645), (29830, 40753)]