21781250

素因数分解:

$2^1\times 5^6\times {\mathrm{17}}^1\times {\mathrm{41}}^1$

素因数の和:90

約数の個数: 56

約数和(自身を含む): 44296308

約数和(自身を除く): 22515058

約数列:

[1, 2, 5, 10, 17, 25, 34, 41, 50, 82, 85, 125, 170, 205, 250, 410, 425, 625, 697, 850, 1025, 1250, 1394, 2050, 2125, 3125, 3485, 4250, 5125, 6250, 6970, 10250, 10625, 15625, 17425, 21250, 25625, 31250, 34850, 51250, 53125, 87125, 106250, 128125, 174250, 256250, 265625, 435625, 531250, 640625, 871250, 1281250, 2178125, 4356250, 10890625, 21781250]

約数ペア:

[(1, 21781250), (2, 10890625), (5, 4356250), (10, 2178125), (17, 1281250), (25, 871250), (34, 640625), (41, 531250), (50, 435625), (82, 265625), (85, 256250), (125, 174250), (170, 128125), (205, 106250), (250, 87125), (410, 53125), (425, 51250), (625, 34850), (697, 31250), (850, 25625), (1025, 21250), (1250, 17425), (1394, 15625), (2050, 10625), (2125, 10250), (3125, 6970), (3485, 6250), (4250, 5125)]