212903420

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 470178240

約数和(自身を除く): 257274820

約数列:

[1, 2, 4, 5, 10, 20, 47, 61, 79, 94, 122, 158, 188, 235, 244, 305, 316, 395, 470, 610, 790, 940, 1220, 1580, 2209, 2867, 3713, 4418, 4819, 5734, 7426, 8836, 9638, 11045, 11468, 14335, 14852, 18565, 19276, 22090, 24095, 28670, 37130, 44180, 48190, 57340, 74260, 96380, 134749, 174511, 226493, 269498, 349022, 452986, 538996, 673745, 698044, 872555, 905972, 1132465, 1347490, 1745110, 2264930, 2694980, 3490220, 4529860, 10645171, 21290342, 42580684, 53225855, 106451710, 212903420]

約数ペア:

[(1, 212903420), (2, 106451710), (4, 53225855), (5, 42580684), (10, 21290342), (20, 10645171), (47, 4529860), (61, 3490220), (79, 2694980), (94, 2264930), (122, 1745110), (158, 1347490), (188, 1132465), (235, 905972), (244, 872555), (305, 698044), (316, 673745), (395, 538996), (470, 452986), (610, 349022), (790, 269498), (940, 226493), (1220, 174511), (1580, 134749), (2209, 96380), (2867, 74260), (3713, 57340), (4418, 48190), (4819, 44180), (5734, 37130), (7426, 28670), (8836, 24095), (9638, 22090), (11045, 19276), (11468, 18565), (14335, 14852)]