21055960

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{347}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 49986720

約数和(自身を除く): 28930760

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 41, 74, 82, 148, 164, 185, 205, 296, 328, 347, 370, 410, 694, 740, 820, 1388, 1480, 1517, 1640, 1735, 2776, 3034, 3470, 6068, 6940, 7585, 12136, 12839, 13880, 14227, 15170, 25678, 28454, 30340, 51356, 56908, 60680, 64195, 71135, 102712, 113816, 128390, 142270, 256780, 284540, 513560, 526399, 569080, 1052798, 2105596, 2631995, 4211192, 5263990, 10527980, 21055960]

約数ペア:

[(1, 21055960), (2, 10527980), (4, 5263990), (5, 4211192), (8, 2631995), (10, 2105596), (20, 1052798), (37, 569080), (40, 526399), (41, 513560), (74, 284540), (82, 256780), (148, 142270), (164, 128390), (185, 113816), (205, 102712), (296, 71135), (328, 64195), (347, 60680), (370, 56908), (410, 51356), (694, 30340), (740, 28454), (820, 25678), (1388, 15170), (1480, 14227), (1517, 13880), (1640, 12839), (1735, 12136), (2776, 7585), (3034, 6940), (3470, 6068)]