28780400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1$

素因数の和:271

約数の個数: 120

約数和(自身を含む): 78233088

約数和(自身を除く): 49452688

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 31, 40, 44, 50, 55, 62, 80, 88, 100, 110, 124, 155, 176, 200, 211, 220, 248, 275, 310, 341, 400, 422, 440, 496, 550, 620, 682, 775, 844, 880, 1055, 1100, 1240, 1364, 1550, 1688, 1705, 2110, 2200, 2321, 2480, 2728, 3100, 3376, 3410, 4220, 4400, 4642, 5275, 5456, 6200, 6541, 6820, 8440, 8525, 9284, 10550, 11605, 12400, 13082, 13640, 16880, 17050, 18568, 21100, 23210, 26164, 27280, 32705, 34100, 37136, 42200, 46420, 52328, 58025, 65410, 68200, 71951, 84400, 92840, 104656, 116050, 130820, 136400, 143902, 163525, 185680, 232100, 261640, 287804, 327050, 359755, 464200, 523280, 575608, 654100, 719510, 928400, 1151216, 1308200, 1439020, 1798775, 2616400, 2878040, 3597550, 5756080, 7195100, 14390200, 28780400]

約数ペア:

[(1, 28780400), (2, 14390200), (4, 7195100), (5, 5756080), (8, 3597550), (10, 2878040), (11, 2616400), (16, 1798775), (20, 1439020), (22, 1308200), (25, 1151216), (31, 928400), (40, 719510), (44, 654100), (50, 575608), (55, 523280), (62, 464200), (80, 359755), (88, 327050), (100, 287804), (110, 261640), (124, 232100), (155, 185680), (176, 163525), (200, 143902), (211, 136400), (220, 130820), (248, 116050), (275, 104656), (310, 92840), (341, 84400), (400, 71951), (422, 68200), (440, 65410), (496, 58025), (550, 52328), (620, 46420), (682, 42200), (775, 37136), (844, 34100), (880, 32705), (1055, 27280), (1100, 26164), (1240, 23210), (1364, 21100), (1550, 18568), (1688, 17050), (1705, 16880), (2110, 13640), (2200, 13082), (2321, 12400), (2480, 11605), (2728, 10550), (3100, 9284), (3376, 8525), (3410, 8440), (4220, 6820), (4400, 6541), (4642, 6200), (5275, 5456)]