21618275

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 32997888

約数和(自身を除く): 11379613

約数列:

[1, 5, 7, 23, 25, 35, 41, 115, 131, 161, 175, 205, 287, 575, 655, 805, 917, 943, 1025, 1435, 3013, 3275, 4025, 4585, 4715, 5371, 6601, 7175, 15065, 21091, 22925, 23575, 26855, 33005, 37597, 75325, 105455, 123533, 134275, 165025, 187985, 527275, 617665, 864731, 939925, 3088325, 4323655, 21618275]

約数ペア:

[(1, 21618275), (5, 4323655), (7, 3088325), (23, 939925), (25, 864731), (35, 617665), (41, 527275), (115, 187985), (131, 165025), (161, 134275), (175, 123533), (205, 105455), (287, 75325), (575, 37597), (655, 33005), (805, 26855), (917, 23575), (943, 22925), (1025, 21091), (1435, 15065), (3013, 7175), (3275, 6601), (4025, 5371), (4585, 4715)]