81981120

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6569}}^1$

素因数の和:6602

約数の個数: 112

約数和(自身を含む): 280355040

約数和(自身を除く): 198373920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 390, 416, 480, 520, 624, 780, 832, 960, 1040, 1248, 1560, 2080, 2496, 3120, 4160, 6240, 6569, 12480, 13138, 19707, 26276, 32845, 39414, 52552, 65690, 78828, 85397, 98535, 105104, 131380, 157656, 170794, 197070, 210208, 256191, 262760, 315312, 341588, 394140, 420416, 426985, 512382, 525520, 630624, 683176, 788280, 853970, 1024764, 1051040, 1261248, 1280955, 1366352, 1576560, 1707940, 2049528, 2102080, 2561910, 2732704, 3153120, 3415880, 4099056, 5123820, 5465408, 6306240, 6831760, 8198112, 10247640, 13663520, 16396224, 20495280, 27327040, 40990560, 81981120]

約数ペア:

[(1, 81981120), (2, 40990560), (3, 27327040), (4, 20495280), (5, 16396224), (6, 13663520), (8, 10247640), (10, 8198112), (12, 6831760), (13, 6306240), (15, 5465408), (16, 5123820), (20, 4099056), (24, 3415880), (26, 3153120), (30, 2732704), (32, 2561910), (39, 2102080), (40, 2049528), (48, 1707940), (52, 1576560), (60, 1366352), (64, 1280955), (65, 1261248), (78, 1051040), (80, 1024764), (96, 853970), (104, 788280), (120, 683176), (130, 630624), (156, 525520), (160, 512382), (192, 426985), (195, 420416), (208, 394140), (240, 341588), (260, 315312), (312, 262760), (320, 256191), (390, 210208), (416, 197070), (480, 170794), (520, 157656), (624, 131380), (780, 105104), (832, 98535), (960, 85397), (1040, 78828), (1248, 65690), (1560, 52552), (2080, 39414), (2496, 32845), (3120, 26276), (4160, 19707), (6240, 13138), (6569, 12480)]